You've known it was coming, but Isis has been so quiet on the mobile payments front in the past few months that you might've forgotten the score. Now, the joint venture backed by AT&T, T-Mobile and Verizon has announced that it'll debut its system in Austin and Salt Lake City next month. At least part of the delay is attributed to its shift in strategy, when Isis shelved its plans to process payments through the carriers themselves and instead work with MasterCard and Visa. Isis representatives have declined to elaborate on future expansion plans.

Coinciding with the recent update that enabled Isis support for T-Mobile's Galaxy S II, MasterCard has come clean with a list of devices that'll receive similar treatment. Specifically, those in the US can expect the Droid Incredible 4G LTE, One X, Amaze 4G, Galaxy S III to gain Isis support. Naturally, the possibility remains open for other devices as well, and if you'd like to see the complete list of candidates, make sure to check out the PDF below.

*Verizon has acquired AOL, Engadget's parent company. However, Engadget maintains full editorial control, and Verizon will have to pry it from our cold, dead hands.